Preservative coating composition.



UNITED STATES PATENT OFFICE.

WALTER SCHOELLER AND WALTHER SCHRAUTH, 0F BERLIN, GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FRIEDR. BAYER & 00., OFELBERFELD, GERMANY, A

CORPORATION OF GERMANY.

PRESERVATIVE COATING COMPOSITION.

No Drawing.

. Patented Feb. 17, 1914.

* ed formula:

a (R meaning a halogen substituted benzene nucleus) are obtained 6. g. by heating molecular proportions of mercuric sulfate and halogen-phenols in aqueous solution. The anhydrid of oxy-mercuric-ortho-chlor-phe- 1101, produced from ortho-chlor-phenol, has

the following graphically represented formula: v

In the form of its monovalent metal 'compounds it has the following graphically repform of its dlvalent metal compounds it has that representedvby the following formula:

(Me standin for the metal.) The thus obtained anhy rids of halogen-phenols separate in crystalline form and are completely insoluble in water. The crystals are then mixed to the extent of about 2 per cent. with any of the varnishes generally employed to sh1ps bottom and furnish coatings of remarkable preserving properties. Instead of the sulfate of mercury other mercury salts for instance the acetate of mercury can be used. Instead of the anhydrids themselves we may employ as additions to the varnishes the salts of these anhydrids made with heavy metals such as copper, lead, zinc, etc.,, as described in our application No. 568,103,filed June 21, 1910.

The term mercury derivative of a halogen-phenol is used in the following claims to include not onl the anhydrids but also the metal salts of these anhydrids such as those already referred to.

We claim 1. A coating material comprisin a meroury derivative of a halogen-pheno in conjunction with a suitable vehicle, substantially as described. 2. A coating material comprising an oxymercuric-halogen-phenol substance in conjunction with a suitable vehicle, substantially as described.

3. A coating material comprising the anhydrids of oxymercuric-halogen-phenols of the following graphically represented formula':

. (R meaning a halogen substituted benzene nucleus) in conjunction with a suitable vehicle, substantially as described.

4. A coating material comprising the anh drid of oxymercuric-ortho-chlor-lphenol of t egraphically represented formu a:

. in conjunction with a suitable vehicle, substantially as described.

In testimony whereof we have hereunto .set our hands in the presence of two subscribing witnesses.

DR. WALTER SCHOELLER... DR. WALTI-IER SCHRAUTH. Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

